Commands by bartman (2)

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Getting a domain from url, ex: very nice to get url from squid access.log

Rename all .jpeg and .JPG files to have .jpg extension
the "i" controls case sensitiveness. It's slightly inefficient since it uselessly renames .jpg to .jpg, but that's more than compensated by launching only one process instead of two, besides being shorter to write.

interactive rss-based colorful commandline-fu reader perl oneliner (v0.1)
required packages: curl, xml2, html2text command is truncated, see 'sample output'

Netstat Connection Check
This command does a tally of concurrent active connections from single IPs and prints out those IPs that have the most active concurrent connections. VERY useful in determining the source of a DoS or DDoS attack.

Shows space used by each directory of the root filesystem excluding mountpoints/external filesystems (and sort the output)
Excludes other mountpoints with acavagni's "mountpoint" idea, but with -exec instead of piping to an xargs subshell. Then, calling "du" only once with -exec's "+" option. The first "\! -exec" acts as a test so only those who match are passed to the second "-exec" for du.

Get the dir listing of an executable without knowing its location

Find usb device in realtime
Using this command you can track a moment when usb device was attached.

Replaces a color in a PDF document, useful for removing a dark background before printing.
The pdf is first converted to a bitmap, so change "-density" to match your printer resolution. Also be careful about the RAM required. In this example rgb(0,0,0) is replaced by rgb(255,255,255), change to suit your needs.

Convert CSV to JSON
Replace 'csv_file.csv' with your filename.

Do one ping to a URL, I use this in a MRTG gauge graph to monitor connectivity


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